Touch display panel and touch display device

ABSTRACT

The present disclosure provides a touch display panel, including a display region and a non-display region surrounding the display region. The non-display region includes a bonding region arranged at one side of the display region along a first direction. The touch display panel further includes a display signal line and a touch signal line. The bonding region includes a first pad and a second pad, the display signal line is coupled to a flexible printed circuit via the first pad, the touch signal line is coupled to the flexible printed circuit via the second pad, and the second pad is arranged at one side of the first pad along a second direction.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims a priority of the Chinese patent application No.202110117700.9 filed on Jan. 28, 2021, which is incorporated herein byreference in its entirety.

TECHNICAL FIELD

The present disclosure relates to the manufacture of a display product,in particular to a touch display panel and a touch display device.

BACKGROUND

Screen-to-body ratio has become one of the main selling points forhigh-end mobile phones, and a display panel is required to be providedwith a bezel at an increasingly small size. For a full-screen,bezel-free display product (such as mobile phone), a screen covers anentire front surface of the display product, so as to achieve ascreen-to-body ratio of approximately 100%. In this way, it is able toimprove the appearance of the mobile phone and provide a sense oftechnology. In addition, it is able to provide the mobile phone with alarger screen, so as to significantly improve the visual experience.

SUMMARY

In one aspect, the present disclosure provides in some embodiments atouch display panel, including a display region and a non-display regionsurrounding the display region. The non-display region includes abonding region arranged at one side of the display region along a firstdirection, and a first bezel region and a second bezel region arrangedrespectively at two opposite sides of the bonding region along a seconddirection perpendicular to the first direction. The touch display panelfurther includes a display signal line and a touch signal line. Thebonding region includes a first pad and a second pad, the display signalline is coupled to a flexible printed circuit via the first pad, thetouch signal line is coupled to the flexible printed circuit via thesecond pad, and the second pad is arranged at one side of the first padalong the second direction.

In a possible embodiment of the present disclosure, the touch signalline includes a sensing signal line and a driving signal line, and thesensing signal line includes a first secondary sensing signal lineextending along the first bezel region to the bonding region and asecond secondary sensing signal line extending along the second bezelregion to the bonding region. The first secondary sensing signal lineincludes a first portion arranged at the bonding region and extendingalong the first direction to the second pad. The second secondarysensing signal line includes a second portion, a third portion and afourth portion arranged at the bonding region, the second portionextends along the first direction, the third portion extends from oneend of the second portion, is bent and then extends along the seconddirection, and the fourth portion extends from one end of the thirdportion, is bent and then extends along the first direction to thesecond pad. The driving signal line is extracted from a side of thedisplay region adjacent to the bonding region, and extends along thefirst direction to the second pad.

In a possible embodiment of the present disclosure, the bonding regionincludes a bending region and a non-bending region along the firstdirection, and the third portion is arranged at a side of the bendingregion adjacent to or away from the display region.

In a possible embodiment of the present disclosure, the touch signalline includes a sensing signal line and a driving signal line, thesensing signal line extends along the first bezel region to the bondingregion and includes a fifth portion arranged at the bonding region andextending along the first direction to the second pad, the drivingsignal line is extracted from a side of the display region adjacent tothe bonding region and includes a first secondary driving signal lineand a second secondary driving signal line, the first secondary drivingsignal line is arranged at a side adjacent to the second pad and extendsalong the first direction to the second pad, the second secondarydriving signal line includes a sixth portion, a seventh portion and aneighth portion, the sixth portion extends along the first direction, theseventh portion extends from one end of the sixth portion, is bent andthen extends along the second direction, and the eighth portion extendsfrom one end of the seventh portion, is bent and then extends along thefirst direction to the second pad.

In a possible embodiment of the present disclosure, the bonding regionincludes a bending region and a non-bending region along the firstdirection, and the seventh portion is arranged at a side of the bendingregion adjacent to or away from the display region.

In a possible embodiment of the present disclosure, an isolation layeris arranged between the display signal line and the touch signal line inthe bonding region in a direction away from a substrate.

In a possible embodiment of the present disclosure, the isolation layerincludes an organic material layer made of an organic material.

In a possible embodiment of the present disclosure, the isolation layerincludes a metal shielding line with a fixed potential, and the metalshielding line is arranged at a same layer as a power source signal lineof the touch display panel.

In a possible embodiment of the present disclosure, the isolation layerincludes a metal shielding line with a fixed potential and an organicmaterial layer arranged between the metal shielding line and the touchsignal line, and the metal shielding line is arranged at a same layer asa power source signal line of the touch display panel.

In a possible embodiment of the present disclosure, the power sourcesignal line serves as the metal shielding line.

In a possible embodiment of the present disclosure, a first inorganicinsulation layer is arranged between the isolation layer and the touchsignal line.

In a possible embodiment of the present disclosure, the touch displaypanel further includes a substrate, and an organic light-emitting unitand a thin film encapsulation layer laminated one on another on thesubstrate. A barrier layer is arranged at the non-display region in sucha manner as to surround the display region, the thin film encapsulationlayer includes a first region and a second region surrounding the firstregion, a part of the second region is arranged at a side of the barrierlayer away from the substrate, a planarization layer is arranged at aside of the second region away from the substrate, and the touch signalline is extracted from the display region and extends through theplanarization layer to the bonding region in the non-display region.

In a possible embodiment of the present disclosure, the touch displaypanel further includes a second inorganic insulation layer arranged at aside of the planarization layer away from the substrate.

In a possible embodiment of the present disclosure, a surface of theplanarization layer adjacent to the bonding region is an arc-likesurface.

In a possible embodiment of the present disclosure, an isolation layeris arranged between the display signal line and the touch signal line inthe bonding region in a direction away from the substrate, and theisolation layer is arranged at a same layer, and made of a samematerial, as the planarization layer.

In a possible embodiment of the present disclosure, the planarizationlayer and the isolation layer are each made of an organic material.

In another aspect, the present disclosure provides in some embodiments atouch display device including the above-mentioned touch display panel.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view showing the distribution of lines on aconventional touch display panel after the removal of a touch layer;

FIG. 2 is a schematic view showing the distribution of a touch signalline in the related art;

FIG. 3 is a schematic view showing the distribution of a touch signalline according to one embodiment of the present disclosure;

FIG. 4 is another schematic view showing the distribution of the touchsignal line according to one embodiment of the present disclosure;

FIG. 5 is yet another schematic view showing the distribution of thetouch signal line according to one embodiment of the present disclosure;

FIG. 6 is still yet another schematic view showing the distribution ofthe touch signal line according to one embodiment of the presentdisclosure;

FIG. 7 is a partially schematic view of the conventional touch displaypanel;

FIG. 8 is a partially schematic view of a touch display panel accordingto one embodiment of the present disclosure;

FIG. 9 is another partially schematic view of the touch display panelaccording to one embodiment of the present disclosure; and

FIG. 10 is yet another partially schematic view of a touch display panelaccording to one embodiment of the present disclosure.

DETAILED DESCRIPTION

In order to make the objects, the technical solutions and the advantagesof the present disclosure more apparent, the present disclosure will bedescribed hereinafter in a clear and complete manner in conjunction withthe drawings and embodiments. Obviously, the following embodimentsmerely relate to a part of, rather than all of, the embodiments of thepresent disclosure, and based on these embodiments, a person skilled inthe art may, without any creative effort, obtain the other embodiments,which also fall within the scope of the present disclosure.

In the embodiments of the present disclosure, it should be appreciatedthat, such words as “in the middle of”, “on/above”, “under/below”,“left”, “right”, “vertical”, “horizontal”, “inside” and “outside” may beused to indicate directions or positions as viewed in the drawings, andthey are merely used to facilitate the description in the presentdisclosure, rather than to indicate or imply that a device or membermust be arranged or operated at a specific position. In addition, suchwords as “first”, “second” and “third” may be merely used todifferentiate different components rather than to indicate or imply anyimportance.

In the design of an on-cell touch panel, usually a touch active regionis greater than an active display region of the panel, i.e., an edge ofa touch electrode block extends beyond the active display region. Inaddition, a touch signal line needs to be extracted from an upper end ofa display region and extends along each of a left side and a right sideof the display region to a bonding region at a lower end, is coupled toa Flexible Printed Circuit (FPC), and then is coupled to a touchintegrated circuit (T-IC) via a line on the FPC. However, display signallines are arranged in the middle of the bonding region as well as in themiddle of the FPC, so the touch signal line at one side may inevitablycross the display signal line. Taking crosstalk into consideration,usually the FPC includes more than two layers, so as to shield signalinterference. Hence, the manufacture cost of the FPC, in terms ofprocess steps and materials, may increase.

In addition, the touch signal line is provided with a larger width dueto its large distance from the bonding region, so it is difficult toreduce a size of each of a left bezel and a right bezel of the on-celltouch display panel (its size has reached a limit). There is an urgentneed to provide a new design to meet the requirement on a narrow bezel.

As shown in FIGS. 1 and 2, in the related art, a touch display panelincludes a display region (AA) and a non-display region surrounding thedisplay region. The non-display region includes a bonding regionarranged at one side of the display region, and bezel regions arrangedrespectively at two opposite sides of the bonding region. A touch signalline is extracted from the display region, and extends along acorresponding bezel region to the bonding region. A first pad 1000 boundto a display signal line 60 and a second pad 2000 bound to the touchsignal line are arranged at the bezel region. Each display signal lineis coupled to the FPC via the first pad 1000, and each touch signal lineis coupled to the FPC via a corresponding second pad 2000. Two secondpads 2000 are arranged at two opposite sides of the first pad 1000respectively. As shown in FIG. 2, the display signal line 60 is arrangedalong a first direction (i.e., direction X in FIG. 1), so a part oftouch signal lines inevitably cross the display signal line 60. In therelated art, in order to prevent the occurrence of interference betweenthe display signal line 60 and the touch signal line, the FPC is of amulti-layered plate-like structure, and the quantity of layers isusually greater than two. After the touch signal line has been coupledto the FPC via the corresponding second pad 2000, it is coupled to atouch IC via a line on the FPC. Hence, the manufacture cost of the FPC,in terms of process steps and materials, may increase.

In order to solve the above-mentioned problems, the present disclosureprovides in some embodiments a touch display panel, and a second pad2000 bound to a touch signal line is arranged merely at a side of afirst pad 1000 bound to a display signal line. In this way, it is ableto reduce the quantity of lines on an FPC, and reduce the quantity oflayers of the FPC, thereby to reduce the manufacture cost.

To be specific, the touch display panel includes a display region and anon-display region surrounding the display region. The non-displayregion includes a bonding region arranged at one side of the displayregion along a first direction, and a first bezel region and a secondbezel region arranged respectively at two opposite sides of the bondingregion along a second direction perpendicular to the first direction.The touch display panel further includes a display signal line and atouch signal line. The bonding region includes a first pad 1000 and asecond pad 2000, the display signal line is coupled to a flexibleprinted circuit via the first pad 1000, the touch signal line is coupledto the flexible printed circuit via the second pad 2000, the second pad2000 is arranged at one side of the first pad along the seconddirection.

In the embodiments of the present disclosure, there are the followingwiring modes.

In a first mode, as shown in FIGS. 3 and 4, the touch signal lineincludes a sensing signal line 101 and a driving signal line 102, andthe sensing signal line 101 includes a first secondary sensing signalline extending along the first bezel region to the bonding region and asecond secondary sensing signal line extending along the second bezelregion to the bonding region. The first secondary sensing signal lineincludes a first portion 1011 arranged at the bonding region andextending along the first direction to the second pad 2000. The secondsecondary sensing signal line includes a second portion 1012, a thirdportion 1013 and a fourth portion 1014 arranged at the bonding region,the second portion 1012 extends along the first direction, the thirdportion 1013 extends from one end of the second portion 1012, is bentand then extends along the second direction, and the fourth portionextends from one end of the third portion 1013, is bent and then extendsalong the first direction to the second pad 2000. The driving signalline 102 is extracted from a side of the display region adjacent to thebonding region, and extends along the first direction to the second pad2000.

In this mode, the bonding region includes a bending region and anon-bending region along the first direction, and the third portion 1013is arranged at a side of the bending region adjacent to or away from thedisplay region. The first pad 1000 and the second pad 2000 are arrangedat the non-bending region. FIG. 3 shows a situation where the thirdportion 1013 is arranged at the side of the bending region away from thedisplay region, and FIG. 4 shows a situation where the third portion1013 is arranged at the side of the bending region adjacent to thedisplay region.

In a second mode, as shown in FIGS. 5 and 6, illustratively, the touchsignal line includes a sensing signal line 101 and a driving signal line102, the sensing signal line 101 extends along the first bezel region tothe bonding region and includes a fifth portion 1015 arranged at thebonding region and extending along the first direction to the second pad200, and the driving signal line 102 is extracted from a side of thedisplay region adjacent to the bonding region and includes a firstsecondary driving signal line 1023 and a second secondary driving signalline. The first secondary driving signal line 1023 is arranged at a sideadjacent to the second pad 2000 and extends along the first direction tothe second pad 2000. The second secondary driving signal line includes asixth portion 1024, a seventh portion 1025 and an eighth portion 1026.The sixth portion 1024 extends along the first direction, the seventhportion 1025 extends from one end of the sixth portion 1024, is bent andthen extends along the second direction, and the eighth portion 1026extends from one end of the seventh portion 1025, is bent and thenextends along the first direction to the second pad 2000.

In this mode, the bonding region includes a bending region and anon-bending region along the first direction, and the seventh portion1025 is arranged at a side of the bending region adjacent to or awayfrom the display region. The first pad 1000 and the second pad 2000 arearranged at the non-bending region. FIG. 5 shows a situation where theseventh portion 1025 is arranged at the side of the bending region awayfrom the display region, and FIG. 6 shows a situation where the seventhportion 1025 is arranged at the side adjacent of the bending region tothe display region.

As shown in FIG. 10, illustratively, an isolation layer is arrangedbetween the display signal line 60 and the touch signal line 100 in thebonding region in a direction away from a substrate.

Illustratively, the isolation layer includes an organic material layer501 (also referred to as (overcoat layer, OC layer)) made of an organicmaterial, such as a polymer, e.g., polyacrylate, polyimide orpolycarbonate.

Through the organic material layer 501, it is able to increase adistance between the display signal line 60 and the touch signal line100 in a direction perpendicular to a substrate, thereby to prevent theoccurrence of the interference between the display signal line 60 andthe touch signal line 100.

Illustratively, the isolation layer includes a metal shielding line 502with a fixed potential, and the metal shielding line 502 is arranged ata same layer as a power source signal line of the touch display panel.

The metal shielding line 502 has a shielding effect, so it is able toprevent the occurrence of the interference between the display signalline 60 and the touch signal line 100.

Illustratively, the power source signal line serves as the metalshielding line 502.

As shown in FIGS. 3-6 and 10, in a direction away from the substrate,the touch display panel includes the display signal line 60, the powersource signal line (signal line VDD 2 and signal line VSS 3 in FIG. 1)and the touch signal line 100. The metal shielding line 502 may beprovided separately, or the power source signal line of the touchdisplay panel may serve as the metal shielding line 502.

In some embodiments of the present disclosure, a width of a part of thepower source signal lines in a direction parallel to the substrateincreases, so that an orthogonal projection of the touch signal line 100onto the substrate is located within the corresponding power sourcesignal line. The power source signal line has a shielding effect, i.e.,it serves as the metal shielding line. At this time, it is unnecessaryto provide the metal shielding line separately, thereby to simplify themanufacture process.

In a specific embodiment of the present disclosure, the isolation layerincludes the metal shielding line 502 and the organic material layer501. The organic material layer 501 is arranged between the metalshielding line 502 and the touch signal line 100, so as to effectivelyprevent the occurrence of the interference between the display signalline 60 and the touch signal line 100.

Illustratively, a first inorganic insulation layer 80 is arrangedbetween the isolation layer and the touch signal line 100, so as toprotect the touch signal line 100 thereon.

As shown in FIG. 7, in the related art, the touch display panel includesto display region and a non-display region surrounding the displayregion. The non-display region includes a bonding region arranged at oneside of the display region, and bezel regions respectively arranged attwo opposite sides of the bonding region. A touch signal line isextracted from the display region, and extends along a correspondingbezel region to the bonding region. The non-display region furtherincludes a barrier layer 10 surrounding the display region, and thetouch signal line is arranged at a side of the barrier layer adjacent tothe display region. Due to the touch signal line, the bezel needs to beprovided with a sufficient large width. In the embodiments of thepresent disclosure, a planarization layer is arranged at a region of thenon-display region where the barrier layer is located, and the touchsignal line is arranged on the planarization layer. Hence, the barrierlayer may be moved inwardly to be close to the display region, so as toreduce the width of the bezel region as a whole, thereby to provide anarrow bezel.

To be specific, as shown in FIGS. 8 to 10, the touch display panelincludes a substrate, and an organic light-emitting unit and a thin filmencapsulation layer 20 laminated one on another on the substrate. Abarrier layer 10 is arranged at the non-display region in such a manneras to surround the display region, the thin film encapsulation layer 20includes a first region and a second region surrounding the firstregion, a part of the second region is arranged at a side of the barrierlayer 10 away from the substrate, a planarization layer 30 is arrangedat a side of the second region away from the substrate, and the touchsignal line is extracted from the display region and extends through theplanarization layer 30 to the bonding region on the non-display region.

The thin film encapsulation layer 20 is arranged on the organiclight-emitting unit, so as to prevent a light-emitting layer and otherthin layers in the organic light-emitting unit from being adverselyaffected by external moisture and oxygen. The thin film encapsulationlayer 20 includes at least one inorganic layer and at least one organiclayer laminated one on another alternately. Usually, the barrier layer10 includes a first barrier layer adjacent to the display region and asecond barrier layer away from the display region. The first barrierlayer functions as a stop region for the organic layer of the thin filmencapsulation layer 20, so as to define a range of the organic layer.The second barrier layer functions as to prevent cracks generated in theinorganic layer of the thin film encapsulation layer 20 from spreadingto an interior of the touch display panel, thereby to prevent anencapsulation effect of the thin film encapsulation layer 20 from beingdeteriorated.

The barrier layer 10 has a certain height, so when the touch signal line100 is arranged on the barrier layer 10, it is easily broken, andthereby a touch defect occurs. Hence, the touch signal line 100 isarranged at a side of the barrier layer 10 adjacent to the displayregion, and a sufficient space needs to be reserved at the side of thebarrier layer 10 adjacent to the display region for the touch signalline 100. At this time, it is impossible to further reduce a size of thebezel region. However, in the embodiments of the present disclosure,through the planarization layer 30, it is able to eliminate or reduceunevenness caused by the barrier layer 10 (i.e., eliminate or reduce alevel difference between the first barrier layer and the second barrierlayer and a level difference between the first barrier layer and thedisplay region). The touch signal line 100 is arranged on theplanarization layer 30, and extends over the barrier layer 10 to thebonding region smoothly without any fluctuations, so it is able toensure the reliability of the touch signal line 100. Based on the above,as compared with FIGS. 7, 8 and 9, the non-display region of the touchdisplay panel includes the bonding region and the bezel regions arrangedrespectively at two opposite sides of the bonding region. FIG. 8 showsthe bezel region, and FIG. 9 shows the bonding region. In theembodiments of the present disclosure, the touch signal line 100 isarranged on the planarization layer 30, so widths of A and B may bereduced, i.e., a width C of the barrier layer 10 adjacent to the displayregion may be reduced. At this time, a part of the touch signal line 100is arranged at a region corresponding to the barrier layer 10. Ascompared with a situation where the touch signal line 100 is arranged atthe side of the barrier layer 10 adjacent to the display region as awhole, it is able to reduce the width of the bezel region, thereby toprovide a narrow bezel.

In the embodiments of the present disclosure, the substrate is made of arigid material, e.g., glass. When the substrate is a glass substrate,the touch display panel has a fixed shape. The substrate may beflexible, extendable, foldable, bendable or rollable, so as to provide aflexible, extendable, foldable, bendable or rollable touch displaypanel. The substrate may be made of any appropriate flexible insulationmaterial, e.g., a polymer such as polyimide (PI), polycarbonate (PC),polyether sulfone (PES), polyethylene terephthalate (PET), polyethylenenaphthalate (PEN), polyarylate (PAR) or fiber reinforced plastics (FRP).The substrate may be transparent, semi-transparent or non-transparent.

In the embodiments of the present disclosure, the planarization layer 30is an OC layer made of an organic material, e.g., a polymer, such aspolyacrylate, PI or PC, and it may be formed through, but not limitedto, an adhesive coating or printing process.

Illustratively, the touch display panel further includes a secondinorganic insulation layer arranged at a side of the planarization layeraway from the substrate.

Through the second inorganic insulation layer 40, it is able to protectthe touch signal line 100 thereon, thereby to prevent the occurrence ofshort-circuit or open-circuit.

Illustratively, a surface of the planarization adjacent to the bondingregion is an arc-like surface. In this way, the touch signal line 100extracted from the display region may extend to the bonding region alonga smooth arc-like surface or an oblique surface, so it is able to ensurethe stability of the touch signal line 100 to the greatest extend,thereby to ensure a reliable touch function.

In some embodiments of the present disclosure, in order to furtherreduce the interference between the display signal line 60 and the touchsignal line 100, an isolation layer is arranged between the displaysignal line and the touch signal line in the bonding region in adirection away from the substrate. In some embodiments of the presentdisclosure, in order to simplify the manufacture process, the isolationlayer is formed at the same time with the planarization layer, i.e., theisolation layer is arranged at a same layer, and made of a samematerial, as the planarization layer.

In some embodiments of the present disclosure, the planarization layerand the isolation layer are each made of an organic material, e.g., apolymer such as polyacrylate, PI or PC, and it may be formed through,but not limited to, an adhesive coating or printing process.

The present disclosure further provides in some embodiments a touchdisplay device including the above-mentioned touch display panel. Thetouch display device may be a mobile phone, a desk-top computer, alaptop computer, a tablet computer or an electronic photo album. Thetouch display device includes the above-mentioned touch display panel,so it also has the advantages of the touch display panel as mentionedhereinabove.

The above embodiments are for illustrative purposes only, but thepresent disclosure is not limited thereto. Obviously, a person skilledin the art may make further modifications and improvements withoutdeparting from the spirit of the present disclosure, and thesemodifications and improvements shall also fall within the scope of thepresent disclosure.

What is claimed is:
 1. A touch display panel, comprising a displayregion and a non-display region surrounding the display region, whereinthe non-display region comprises a bonding region arranged at one sideof the display region along a first direction, and a first bezel regionand a second bezel region arranged respectively at two opposite sides ofthe bonding region along a second direction perpendicular to the firstdirection; the touch display panel further comprises a display signalline and a touch signal line; and the bonding region comprises a firstpad and a second pad, the display signal line is coupled to a flexibleprinted circuit via the first pad, the touch signal line is coupled tothe flexible printed circuit via the second pad, and the second pad isarranged at one side of the first pad along the second direction.
 2. Thetouch display panel according to claim 1, wherein the touch signal linecomprises a sensing signal line and a driving signal line, and thesensing signal line comprises a first secondary sensing signal lineextending along the first bezel region to the bonding region and asecond secondary sensing signal line extending along the second bezelregion to the bonding region; the first secondary sensing signal linecomprises a first portion arranged at the bonding region and extendingalong the first direction to the second pad; the second secondarysensing signal line comprises a second portion, a third portion and afourth portion arranged at the bonding region, the second portionextends along the first direction, the third portion extends from oneend of the second portion, is bent and then extends along the seconddirection, and the fourth portion extends from one end of the thirdportion, is bent and then extends along the first direction to thesecond pad; and the driving signal line is extracted from a side of thedisplay region adjacent to the bonding region, and extends along thefirst direction to the second pad.
 3. The touch display panel accordingto claim 2, wherein the bonding region comprises a bending region and anon-bending region along the first direction, and the third portion isarranged at a side of the bending region adjacent to or away from thedisplay region.
 4. The touch display panel according to claim 1, whereinthe touch signal line comprises a sensing signal line and a drivingsignal line, the sensing signal line extends along the first bezelregion to the bonding region and comprises a fifth portion arranged atthe bonding region and extending along the first direction to the secondpad, the driving signal line is extracted from a side of the displayregion adjacent to the bonding region and comprises a first secondarydriving signal line and a second secondary driving signal line, thefirst secondary driving signal line is arranged at a side adjacent tothe second pad and extends along the first direction to the second pad,the second secondary driving signal line comprises a sixth portion, aseventh portion and an eighth portion, the sixth portion extends alongthe first direction, the seventh portion extends from one end of thesixth portion, is bent and then extends along the second direction, andthe eighth portion extends from one end of the seventh portion, is bentand then extends along the first direction to the second pad.
 5. Thetouch display panel according to claim 4, wherein the bonding regioncomprises a bending region and a non-bending region along the firstdirection, and the seventh portion is arranged at a side of the bendingregion adjacent to or away from the display region.
 6. The touch displaypanel according to claim 1, wherein an isolation layer is arrangedbetween the display signal line and the touch signal line in the bondingregion in a direction away from a substrate.
 7. The touch display panelaccording to claim 6, wherein the isolation layer comprises an organicmaterial layer made of an organic material.
 8. The touch display panelaccording to claim 6, wherein the isolation layer comprises a metalshielding line with a fixed potential, and the metal shielding line isarranged at a same layer as a power source signal line of the touchdisplay panel.
 9. The touch display panel according to claim 6, whereinthe isolation layer comprises a metal shielding line with a fixedpotential and an organic material layer arranged between the metalshielding line and the touch signal line, and the metal shielding lineis arranged at a same layer as a power source signal line of the touchdisplay panel.
 10. The touch display panel according to claim 8, whereinthe power source signal line serves as the metal shielding line.
 11. Thetouch display panel according to claim 9, wherein the power sourcesignal line serves as the metal shielding line.
 12. The touch displaypanel according to claim 6, wherein a first inorganic insulation layeris arranged between the isolation layer and the touch signal line. 13.The touch display panel according to claim 1, further comprising asubstrate, and an organic light-emitting unit and a thin filmencapsulation layer laminated one on another on the substrate, wherein abarrier layer is arranged at the non-display region in such a manner asto surround the display region, the thin film encapsulation layercomprises a first region and a second region surrounding the firstregion, a part of the second region is arranged at a side of the barrierlayer away from the substrate, a planarization layer is arranged at aside of the second region away from the substrate, and the touch signalline is extracted from the display region and extends through theplanarization layer to the bonding region in the non-display region. 14.The touch display panel according to claim 13, further comprising asecond inorganic insulation layer arranged at a side of theplanarization layer away from the substrate.
 15. The touch display panelaccording to claim 13, wherein a surface of the planarization layeradjacent to the bonding region is an arc-like surface.
 16. The touchdisplay panel according to claim 13, wherein an isolation layer isarranged between the display signal line and the touch signal line inthe bonding region in a direction away from the substrate, and theisolation layer is arranged at a same layer, and made of a samematerial, as the planarization layer.
 17. The touch display panelaccording to claim 16, wherein the planarization layer and the isolationlayer are each made of an organic material.
 18. A touch display device,comprising a touch display panel, wherein the touch display panelcomprises a display region and a non-display region surrounding thedisplay region, wherein the non-display region comprises a bondingregion arranged at one side of the display region along a firstdirection, and a first bezel region and a second bezel region arrangedrespectively at two opposite sides of the bonding region along a seconddirection perpendicular to the first direction; the touch display panelfurther comprises a display signal line and a touch signal line; and thebonding region comprises a first pad and a second pad, the displaysignal line is coupled to a flexible printed circuit via the first pad,the touch signal line is coupled to the flexible printed circuit via thesecond pad, and the second pad is arranged at one side of the first padalong the second direction.
 19. The touch display device according toclaim 18, wherein the touch signal line comprises a sensing signal lineand a driving signal line, and the sensing signal line comprises a firstsecondary sensing signal line extending along the first bezel region tothe bonding region and a second secondary sensing signal line extendingalong the second bezel region to the bonding region; the first secondarysensing signal line comprises a first portion arranged at the bondingregion and extending along the first direction to the second pad; thesecond secondary sensing signal line comprises a second portion, a thirdportion and a fourth portion arranged at the bonding region, the secondportion extends along the first direction, the third portion extendsfrom one end of the second portion, is bent and then extends along thesecond direction, and the fourth portion extends from one end of thethird portion, is bent and then extends along the first direction to thesecond pad; and the driving signal line is extracted from a side of thedisplay region adjacent to the bonding region, and extends along thefirst direction to the second pad.
 20. The touch display deviceaccording to claim 19, wherein the bonding region comprises a bendingregion and a non-bending region along the first direction, and the thirdportion is arranged at a side of the bending region adjacent to or awayfrom the display region.